devdocs/assets/stylesheets/pages/_tcl_tk.scss

._tcl_tk {
    /* make content listing more compact */
    .description {
	margin: 0;
	> dd {
	    margin: 0;
	}
    }
    dl {
	margin: 0;
    }
    .copy {
        /* per page copyright */
        white-space: pre;
        font-size: 80%;
        border-top: 1px solid #6A6A6A;
        margin-top: 2em;
    }
}